Around 1100 BC The Chinese scientist Chu Kong, observing the shadow of the gnomon during the winter and summer solstices, measured the inclination of the ecliptic to the equator and determined it to be 23° 54' 02".Since then and now it is accepted that the rotation of the planets of the solar system occurs in one plane - the ecliptic, with small deviations of a few degrees of individual planets from the plane of rotation of the Earth.The planes of rotation of all planets in the past centuries and now are characterized by only one parameter - the angle of inclination. Searches for other parameters characterizing the planes of rotation of planets have not been carried out and today they do not exist.The study showed that the movement of any objects within planetary systems occurs along a wavy surface. The study showed that the "plane" of rotation of the planets is an S-shaped surface.